Keystones — Lintel
Five GCSE retrieval questions · 13 July 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 62,000,000 in standard form
Answer: 6.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.14cm -
4. Ratio Mixed ratio problems
£175.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £50.00 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 39, 30, 19, what is the missing number?
Answer: 68